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[Qemu-devel] [PATCH v4] vhost: fix log base address
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PATCH v4] vhost: fix log base address |
Date: |
Fri, 17 Apr 2015 17:13:24 +0200 |
VHOST_SET_LOG_BASE got an incorrect address, causing
migration errors and potentially even memory corruption.
Reported-by: Wen Congyang <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
changed (uint64_t)(unsigned long) to (uintptr_t).
Untested.
Wen Congyang, can you pls test and confirm.
hw/virtio/vhost.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 8dd2f59..b83675f 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -288,7 +288,7 @@ static inline void vhost_dev_log_resize(struct vhost_dev*
dev, uint64_t size)
int r;
log = g_malloc0(size * sizeof *log);
- log_base = (uint64_t)(unsigned long)log;
+ log_base = (uintptr_t)log;
r = dev->vhost_ops->vhost_call(dev, VHOST_SET_LOG_BASE, &log_base);
assert(r >= 0);
/* Sync only the range covered by the old log */
@@ -1016,10 +1016,13 @@ int vhost_dev_start(struct vhost_dev *hdev,
VirtIODevice *vdev)
}
if (hdev->log_enabled) {
+ uint64_t log_base;
+
hdev->log_size = vhost_get_log_size(hdev);
hdev->log = hdev->log_size ?
g_malloc0(hdev->log_size * sizeof *hdev->log) : NULL;
- r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_LOG_BASE, hdev->log);
+ log_base = (uintptr_t)hdev->log;
+ r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_LOG_BASE, &log_base);
if (r < 0) {
r = -errno;
goto fail_log;
--
MST
- [Qemu-devel] [PATCH v4] vhost: fix log base address,
Michael S. Tsirkin <=